![Jay Van Bavel on Twitter: "I've created a single-item measure of pro-sociality: It is simply whether you press the elevator "door open" or "door closed" button when someone else is racing to Jay Van Bavel on Twitter: "I've created a single-item measure of pro-sociality: It is simply whether you press the elevator "door open" or "door closed" button when someone else is racing to](https://pbs.twimg.com/media/D5sIdyQWwAA6U1n.jpg)
Jay Van Bavel on Twitter: "I've created a single-item measure of pro-sociality: It is simply whether you press the elevator "door open" or "door closed" button when someone else is racing to
What the 'door close' button in Hong Kong lifts reveals about selfish city | South China Morning Post
![How can the design for elevator/lift door open/close buttons be improved? - User Experience Stack Exchange How can the design for elevator/lift door open/close buttons be improved? - User Experience Stack Exchange](https://i.stack.imgur.com/SBciq.jpg)